Chemistry - Study Mode

[#976] What is the second largest component in milk ?
Correct Answer

(A) Fat

Explanation

Solution: Components of Milk : Water (87 percent), Carbohydrate (4.9 percent), Fat (3.4 percent), Protein (3.3 percent), and so on.

[#977] Which among the following is a carbohydrate ?
Correct Answer

(B) Cane-sugar

Explanation

Solution: Cane-sugar is carbohydrate and as this name implies, is composed of carbon, hydrogen and oxygen. it is a source of extracting sugar. There are various types of sugar derived from different sources. Simple sugars are called monosaccharides and include glucose, fructose and galactose. The table or granulated sugar most customarily used as food is sucrose, a disaccharide. Other disaccharides include maltose and lactose.

[#978] How many atoms of oxygen are in a glucose molecule?
Correct Answer

(C) 6

Explanation

Solution: There are 6 atoms of oxygen in a glucose molecule.

[#979] Which substance is used to retard the setting action of cement?
Correct Answer

(C) CaSO 4 .2H 2 O

Explanation

Solution: CaSO 4 .2H 2 O (Gypsum) is added to cement clinker to retard setting action of cement.

[#980] Stalactites and Stalagmites form due to the precipitation of :
Correct Answer

(A) CaCO 3

Explanation

Solution: Stalactites and stalagmites are formed by water dripping or flowing from fractures on the ceiling of a cave. The dominant mineral in them is calcite (calcium carbonate) or CaCaO 3 . Their largest displays are formed in caves of limestone and dolomite. Other minerals that may be deposited include other carbonates, opal, chalcedony, limonite, and some sulfides.